Search code examples
javajavafxgluon-mobilejavafxports

StorageService gives an error on GluonHQ framework - How do I solve this?

Normally I have been using FileChooser in JavaFX. Super easy to do that. Just call it and it will open a new window where you can select your file. Done!

But FileChooser does not work on Android and Iphone. I have to choose StorageService instead

https://docs.gluonhq.com/charm/javadoc/5.0.1/com/gluonhq/charm/down/plugins/StorageService.html

File privateStorage = Services.get(StorageService.class)
                          .flatMap(StorageService::getPrivateStorage)
                          .orElseThrow(() -> {
                              new FileNotFoundException("Could not access private storage.");
                          });

But the problem here is that it gives an error:

The method orElseThrow(Supplier<? extends X>) in the type Optional<File> is not applicable for the arguments (() -> {})

So how can I solve this?

Solution

  • You can do it like this:

    Optional.empty().orElseThrow(FileNotFoundException::new);

    or

    Optional.empty().orElseThrow(()->new FileNotFoundException("Some exception"));

    or

    Optional.empty().orElseThrow(() -> {
            return new FileNotFoundException("Some exception");
        });

    Worth to read: When are braces optional in Java 8 lambda syntax?